Transversion - Revision history

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	== Transversion ==		== Transversion ==

	~~A '''transversion''' is a type of~~ [[~~nucleotide]] substitution~~ in ~~[[genetics]] where a [[purine]] is replaced with a [[pyrimidine]], or vice versa~~. ~~This contrasts with a [[transition (genetics)\|transition~~]]~~, where a purine is replaced with another purine, or a pyrimidine is replaced with another pyrimidine.~~		[[File:All_transitions_and_transversions.svg\|thumb\|right\|Diagram showing all possible transitions and transversions in DNA.]]

	~~== Types~~ of ~~Transversions ==~~		A '''transversion''' is a type of [[point mutation]] in [[DNA]] where a [[purine]] is substituted for a [[pyrimidine]], or vice versa. This contrasts with a [[transition (genetics)\|transition]], where a purine is replaced with another purine, or a pyrimidine is replaced with another pyrimidine.

	Transversions ~~can be categorized into four types based on the specific bases involved:~~		=== Types of Transversions ===

	* Adenine (A) to Cytosine (C)		Transversions can be categorized based on the specific bases involved:
	* Adenine (A) to Thymine (T)
	* Guanine (G) to Cytosine (C)
	* Guanine (G) to Thymine (T)

	~~Similarly, the reverse changes~~ (C to A, T to A, C to G, T to G) ~~are also considered transversions.~~		* '''Purine to Pyrimidine:'''
			* [[Adenine]] (A) to [[Cytosine]] (C) or [[Thymine]] (T)
			* [[Guanine]] (G) to Cytosine (C) or Thymine (T)
			* '''Pyrimidine to Purine:'''
			* Cytosine (C) to Adenine (A) or Guanine (G)
			* Thymine (T) to Adenine (A) or Guanine (G)

	== Biological Significance ==		=== Biological Significance ===

	Transversions are less common than transitions in the [[~~genome~~]] ~~due to~~ the ~~structural differences between purines and pyrimidines~~, ~~which make such substitutions~~ more ~~disruptive to~~ the [[~~DNA~~]] ~~double helix. However~~, ~~they can have significant effects on [[gene expression]] and [[~~protein]] function~~, potentially leading to [[genetic disorders]] or [[cancer]]~~.		Transversions are less common than transitions but can have significant effects on the [[genetic code]]. Because they involve a change in the chemical structure of the base, transversions can lead to more drastic changes in the [[amino acid]] sequence of proteins, potentially altering protein function.

	== ~~Detection and Analysis~~ ==		=== Mutational Effects ===

	Transversions can ~~be detected through various [[molecular biology]] techniques, such as [[DNA sequencing]]. They are often analyzed~~ in ~~the context of [[evolutionary biology]] to understand the [[mutation rate]] and [[phylogenetic]] relationships among species.~~		Transversions can result in:

	~~== Related Pages ==~~		* '''[[Missense mutation\|Missense mutations]]''', where the change in base leads to the incorporation of a different amino acid in the protein.
			* '''[[Nonsense mutation\|Nonsense mutations]]''', where the change creates a premature [[stop codon]], leading to truncated proteins.
			* '''[[Silent mutation\|Silent mutations]]''', where the change does not affect the amino acid sequence due to the redundancy of the genetic code.

	* [[Transition (genetics)]]		=== Detection and Analysis ===
	* [[Mutation]]
	* [[DNA]]
	* [[Genetics]]

	~~== References ==~~		Transversions can be detected through various [[molecular biology]] techniques, such as [[DNA sequencing]] and [[polymerase chain reaction]] (PCR). Understanding the frequency and distribution of transversions in a genome can provide insights into the mechanisms of [[mutagenesis]] and the evolutionary pressures acting on an organism.

	~~{{Reflist}}~~		== Related Pages ==

	~~== External Links ==~~		* [[Transition (genetics)]]
			* [[Point mutation]]
	* [~~https://en.wikipedia.org/wiki/Transversion Transversion on Wikipedia~~]		* [[DNA replication]]
			* [[Genetic code]]

	~~[[File:All_transitions_and_transversions.svg\|thumb\|right\|Diagram showing all possible transitions and transversions.]]~~		{{Genetics}}

	[[Category:Genetics]]		[[Category:Genetics]]
	[[Category:Molecular biology]]		[[Category:Molecular biology]]

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2025-02-09T15:42:46Z

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← Older revision		Revision as of 15:42, 9 February 2025
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	~~'''~~Transversion''' is a type of [[mutation]] that occurs in [[DNA]] when a [[purine]] (adenine or guanine) is replaced by a [[pyrimidine]] (cytosine or thymine), or vice versa. This is in contrast to [[transition mutations]], which involve a purine being replaced by another purine, or a pyrimidine being replaced by another pyrimidine.		== Transversion ==

	~~==Mechanism==~~		A '''transversion''' is a type of [[nucleotide]] substitution in [[genetics]] where a [[purine]] is replaced with a [[pyrimidine]], or vice versa. This contrasts with a [[transition (genetics)\|transition]], where a purine is replaced with another purine, or a pyrimidine is replaced with another pyrimidine.
	~~Transversions can occur through~~ a ~~variety~~ of ~~mechanisms, including~~ [[~~deamination~~]], [[~~oxidative damage~~]]~~, and the action of~~ [[~~DNA repair~~]] ~~enzymes~~. ~~They can also be induced by certain~~ [[~~carcinogens~~]], ~~such as those found in tobacco smoke and charred food~~.

	==~~Effects~~==		== Types of Transversions ==
	The effects of transversions can vary widely, depending on the specific location and context of the mutation. In some cases, they can lead to the production of a different [[amino acid]] in a [[protein]], potentially altering its function. This can result in a variety of [[genetic disorders]], including certain forms of [[cancer]]. However, many transversions are [[silent mutations]], meaning they do not result in any noticeable change in the organism.

	~~==Detection==~~		Transversions can be categorized into four types based on the specific bases involved:
	Transversions can be ~~detected using a variety of techniques, including [[DNA sequencing]] and [[polymerase chain reaction]] (PCR). These methods can identify~~ the specific ~~location and nature of the mutation, allowing for targeted treatment strategies.~~

	==~~See also~~==		* Adenine (A) to Cytosine (C)
	* [[Transition ~~mutation~~]]		* Adenine (A) to Thymine (T)
	* [[~~Point mutation~~]]		* Guanine (G) to Cytosine (C)
	* [[~~Frameshift mutation~~]]		* Guanine (G) to Thymine (T)
	* [[~~Missense mutation~~]]
	* [[~~Nonsense mutation~~]]		Similarly, the reverse changes (C to A, T to A, C to G, T to G) are also considered transversions.

			== Biological Significance ==

			Transversions are less common than transitions in the [[genome]] due to the structural differences between purines and pyrimidines, which make such substitutions more disruptive to the [[DNA]] double helix. However, they can have significant effects on [[gene expression]] and [[protein]] function, potentially leading to [[genetic disorders]] or [[cancer]].

			== Detection and Analysis ==

			Transversions can be detected through various [[molecular biology]] techniques, such as [[DNA sequencing]]. They are often analyzed in the context of [[evolutionary biology]] to understand the [[mutation rate]] and [[phylogenetic]] relationships among species.

			== Related Pages ==

			* [[Transition (genetics)]]
			* [[Mutation]]
			* [[DNA]]
			* [[Genetics]]

			== References ==

			{{Reflist}}

			== External Links ==

			* [https://en.wikipedia.org/wiki/Transversion Transversion on Wikipedia]

			[[File:All_transitions_and_transversions.svg\|thumb\|right\|Diagram showing all possible transitions and transversions.]]

	[[Category:Genetics]]		[[Category:Genetics]]
	[[Category:~~Mutation~~]]		[[Category:Molecular biology]]
	~~{{Genetics-stub}}~~

Prab: CSV import

2024-03-02T15:49:29Z

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'''Transversion''' is a type of [[mutation]] that occurs in [[DNA]] when a [[purine]] (adenine or guanine) is replaced by a [[pyrimidine]] (cytosine or thymine), or vice versa. This is in contrast to [[transition mutations]], which involve a purine being replaced by another purine, or a pyrimidine being replaced by another pyrimidine.

==Mechanism==
Transversions can occur through a variety of mechanisms, including [[deamination]], [[oxidative damage]], and the action of [[DNA repair]] enzymes. They can also be induced by certain [[carcinogens]], such as those found in tobacco smoke and charred food.

==Effects==
The effects of transversions can vary widely, depending on the specific location and context of the mutation. In some cases, they can lead to the production of a different [[amino acid]] in a [[protein]], potentially altering its function. This can result in a variety of [[genetic disorders]], including certain forms of [[cancer]]. However, many transversions are [[silent mutations]], meaning they do not result in any noticeable change in the organism.

==Detection==
Transversions can be detected using a variety of techniques, including [[DNA sequencing]] and [[polymerase chain reaction]] (PCR). These methods can identify the specific location and nature of the mutation, allowing for targeted treatment strategies.

==See also==
* [[Transition mutation]]
* [[Point mutation]]
* [[Frameshift mutation]]
* [[Missense mutation]]
* [[Nonsense mutation]]

[[Category:Genetics]]
[[Category:Mutation]]
{{Genetics-stub}}